{"id":45380,"date":"2023-04-22T02:57:01","date_gmt":"2023-04-22T07:57:01","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-produce-ultrasonic-sound-at-home\/"},"modified":"2025-01-21T07:21:10","modified_gmt":"2025-01-21T12:21:10","slug":"how-to-produce-ultrasonic-sound-at-home","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-to-produce-ultrasonic-sound-at-home\/","title":{"rendered":"T\u1ef1 t\u1ea1o \u00e2m thanh si\u00eau \u00e2m t\u1ea1i nh\u00e0: H\u01b0\u1edbng d\u1eabn chi ti\u1ebft"},"content":{"rendered":"

\u00c2m thanh si\u00eau \u00e2m, v\u1edbi t\u1ea7n s\u1ed1 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi, c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng th\u00fa v\u1ecb v\u00e0 thi\u1ebft th\u1ef1c trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y. T\u1eeb vi\u1ec7c \u0111u\u1ed5i mu\u1ed7i, chu\u1ed9t \u0111\u1ebfn l\u00e0m s\u1ea1ch \u0111\u1ed3 trang s\u1ee9c, vi\u1ec7c t\u1ea1o ra \u00e2m thanh si\u00eau \u00e2m t\u1ea1i nh\u00e0 kh\u00f4ng c\u00f2n l\u00e0 \u0111i\u1ec1u qu\u00e1 kh\u00f3 kh\u0103n. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n c\u00e1ch th\u1ef1c hi\u1ec7n \u0111i\u1ec1u \u0111\u00f3 v\u1edbi nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 ti\u1ebfp c\u1eadn.<\/p>\n

S\u1eed d\u1ee5ng m\u1ea1ch \u0111i\u1ec7n t\u1eed<\/h3>\n

Ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ec3 t\u1ea1o ra \u00e2m thanh si\u00eau \u00e2m l\u00e0 s\u1eed d\u1ee5ng m\u1ea1ch \u0111i\u1ec7n t\u1eed. B\u1ea1n c\u00f3 th\u1ec3 t\u1ef1 l\u1eafp r\u00e1p m\u1ea1ch v\u1edbi c\u00e1c linh ki\u1ec7n nh\u01b0 IC 555, transistor, t\u1ee5 \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n tr\u1edf. M\u1ea1ch n\u00e0y s\u1ebd t\u1ea1o ra dao \u0111\u1ed9ng \u0111i\u1ec7n v\u1edbi t\u1ea7n s\u1ed1 si\u00eau \u00e2m, sau \u0111\u00f3 \u0111\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i v\u00e0 ph\u00e1t ra loa si\u00eau \u00e2m. \u01afu \u0111i\u1ec3m c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p n\u00e0y l\u00e0 kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t t\u1ea7n s\u1ed1 v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh. Tuy nhi\u00ean, n\u00f3 \u0111\u00f2i h\u1ecfi ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 \u0111i\u1ec7n t\u1eed v\u00e0 k\u1ef9 n\u0103ng h\u00e0n m\u1ea1ch.<\/p>\n\n\n\n\n\n\n\n\n\n
Linh ki\u1ec7n<\/th>\nCh\u1ee9c n\u0103ng<\/th>\n<\/tr>\n<\/thead>\n
IC 555<\/td>\nT\u1ea1o dao \u0111\u1ed9ng<\/td>\n<\/tr>\n
Transistor<\/td>\nKhu\u1ebfch \u0111\u1ea1i t\u00edn hi\u1ec7u<\/td>\n<\/tr>\n
T\u1ee5 \u0111i\u1ec7n<\/td>\n\u0110i\u1ec1u ch\u1ec9nh t\u1ea7n s\u1ed1<\/td>\n<\/tr>\n
\u0110i\u1ec7n tr\u1edf<\/td>\n\u1ed4n \u0111\u1ecbnh m\u1ea1ch<\/td>\n<\/tr>\n
Loa si\u00eau \u00e2m<\/td>\nPh\u00e1t ra \u00e2m thanh si\u00eau \u00e2m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

S\u1eed d\u1ee5ng Arduino<\/h3>\n

\u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi y\u00eau th\u00edch l\u1eadp tr\u00ecnh, Arduino l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn tuy\u1ec7t v\u1eddi. Ch\u1ec9 v\u1edbi v\u00e0i d\u00f2ng code \u0111\u01a1n gi\u1ea3n v\u00e0 m\u1ed9t module ph\u00e1t \u00e2m thanh si\u00eau \u00e2m, b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng t\u1ea1o ra \u00e2m thanh si\u00eau \u00e2m v\u1edbi t\u1ea7n s\u1ed1 mong mu\u1ed1n. Arduino cho ph\u00e9p \u0111i\u1ec1u khi\u1ec3n linh ho\u1ea1t t\u1ea7n s\u1ed1 v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh, \u0111\u1ed3ng th\u1eddi c\u00f3 th\u1ec3 t\u00edch h\u1ee3p v\u1edbi c\u00e1c c\u1ea3m bi\u1ebfn \u0111\u1ec3 t\u1ea1o ra c\u00e1c \u1ee9ng d\u1ee5ng ph\u1ee9c t\u1ea1p h\u01a1n.<\/p>\n\n\n\n\n\n\n\n
Th\u00e0nh ph\u1ea7n<\/th>\nCh\u1ee9c n\u0103ng<\/th>\n<\/tr>\n<\/thead>\n
Board Arduino<\/td>\n\u0110i\u1ec1u khi\u1ec3n<\/td>\n<\/tr>\n
Module ph\u00e1t \u00e2m thanh si\u00eau \u00e2m<\/td>\nT\u1ea1o v\u00e0 ph\u00e1t \u00e2m thanh<\/td>\n<\/tr>\n
C\u00e1p k\u1ebft n\u1ed1i<\/td>\nK\u1ebft n\u1ed1i c\u00e1c th\u00e0nh ph\u1ea7n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u1eadn d\u1ee5ng thi\u1ebft b\u1ecb c\u00f3 s\u1eb5n<\/h3>\n

M\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed gia d\u1ee5ng c\u0169ng c\u00f3 th\u1ec3 ph\u00e1t ra \u00e2m thanh si\u00eau \u00e2m, v\u00ed d\u1ee5 nh\u01b0 m\u1ed9t s\u1ed1 lo\u1ea1i m\u00e1y \u0111u\u1ed5i mu\u1ed7i, chu\u1ed9t. Tuy nhi\u00ean, t\u1ea7n s\u1ed1 v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb n\u00e0y th\u01b0\u1eddng c\u1ed1 \u0111\u1ecbnh v\u00e0 kh\u00f4ng th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh. B\u1ea1n n\u00ean t\u00ecm hi\u1ec3u k\u1ef9 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a thi\u1ebft b\u1ecb tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng. N\u1ebfu c\u1ea7n m\u1ed9t t\u1ea7n s\u1ed1 c\u1ee5 th\u1ec3, t\u1ef1 l\u1eafp r\u00e1p m\u1ea1ch ho\u1eb7c s\u1eed d\u1ee5ng Arduino v\u1eabn l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1t h\u01a1n.<\/p>\n

L\u01b0u \u00fd khi l\u00e0m vi\u1ec7c v\u1edbi \u00e2m thanh si\u00eau \u00e2m<\/h3>\n

M\u1eb7c d\u00f9 \u00e2m thanh si\u00eau \u00e2m n\u1eb1m ngo\u00e0i ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi, nh\u01b0ng vi\u1ec7c ti\u1ebfp x\u00fac v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 cao trong th\u1eddi gian d\u00e0i v\u1eabn c\u00f3 th\u1ec3 g\u00e2y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ee9c kh\u1ecfe. V\u00ec v\u1eady, b\u1ea1n n\u00ean h\u1ea1n ch\u1ebf th\u1eddi gian ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp v\u1edbi ngu\u1ed3n ph\u00e1t \u00e2m thanh si\u00eau \u00e2m v\u00e0 kh\u00f4ng n\u00ean h\u01b0\u1edbng ngu\u1ed3n ph\u00e1t v\u00e0o tai ho\u1eb7c c\u00e1c b\u1ed9 ph\u1eadn nh\u1ea1y c\u1ea3m kh\u00e1c tr\u00ean c\u01a1 th\u1ec3.<\/p>\n

Vi\u1ec7c t\u1ea1o ra \u00e2m thanh si\u00eau \u00e2m t\u1ea1i nh\u00e0 kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t tr\u1ea3i nghi\u1ec7m th\u00fa v\u1ecb m\u00e0 c\u00f2n m\u1edf ra nhi\u1ec1u \u1ee9ng d\u1ee5ng ti\u1ec1m n\u0103ng. T\u1eeb vi\u1ec7c xua \u0111u\u1ed5i c\u00f4n tr\u00f9ng \u0111\u1ebfn vi\u1ec7c l\u00e0m s\u1ea1ch \u0111\u1ed3 v\u1eadt, \u00e2m thanh si\u00eau \u00e2m c\u00f3 th\u1ec3 mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch thi\u1ebft th\u1ef1c. Hy v\u1ecdng b\u00e0i vi\u1ebft n\u00e0y \u0111\u00e3 cung c\u1ea5p cho b\u1ea1n nh\u1eefng ki\u1ebfn th\u1ee9c c\u1ea7n thi\u1ebft \u0111\u1ec3 b\u1eaft \u0111\u1ea7u kh\u00e1m ph\u00e1 th\u1ebf gi\u1edbi \u00e2m thanh si\u00eau \u00e2m.<\/p>\n","protected":false},"excerpt":{"rendered":"

\u00c2m thanh si\u00eau \u00e2m, v\u1edbi t\u1ea7n s\u1ed1 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi, c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng th\u00fa v\u1ecb v\u00e0 thi\u1ebft th\u1ef1c trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y. T\u1eeb vi\u1ec7c \u0111u\u1ed5i mu\u1ed7i, chu\u1ed9t \u0111\u1ebfn l\u00e0m s\u1ea1ch \u0111\u1ed3 trang s\u1ee9c, vi\u1ec7c t\u1ea1o ra \u00e2m thanh si\u00eau \u00e2m t\u1ea1i nh\u00e0 kh\u00f4ng c\u00f2n l\u00e0 \u0111i\u1ec1u qu\u00e1 kh\u00f3 kh\u0103n.<\/p>\n","protected":false},"author":1,"featured_media":26473,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-45380","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/45380","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/comments?post=45380"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/45380\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26473"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=45380"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=45380"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=45380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}